10028-18-9 Usage
Description
Nickel fluoride is a green crystalline powder with the chemical formula NiF2. It has a tetragonal rutile structure, featuring slightly tetragonally compressed NiF6 octahedra. The compound is relatively unreactive towards concentrated acids and is not attacked by electronegative elements such as chlorine, sulfur, and phosphorus. Above its melting point, nickel fluoride sublimes as a linear gaseous molecule.
Uses
1. Used in Chemical Industry:
Nickel fluoride is used as a passivating agent for nickel alloys, such as monel, due to the formation of a passivating surface. This property makes these materials suitable for storing or transporting hazardous substances like hydrogen fluoride or elemental fluorine.
2. Used in Material Science:
Nickel fluoride's unique chemical properties, including its unreactivity towards concentrated acids and resistance to electronegative elements, make it a valuable material in the field of material science for various applications, such as corrosion-resistant coatings or as a component in the development of new materials with specific properties.
3. Used in Research and Development:
The tetragonal rutile structure and the ability of nickel fluoride to sublime as a linear gaseous molecule at high temperatures make it an interesting subject for research and development in the fields of chemistry and materials science. This could lead to the discovery of new applications and uses for the compound in various industries.
4. Used in Environmental Applications:
Due to its stability and resistance to electronegative elements, nickel fluoride may be utilized in environmental applications, such as waste management or pollution control, where its properties can help in the safe handling and storage of hazardous materials.
Preparation
Nickel fluoride tetrahydrate [13940-83-5], NiF2.4H2O, and its anhydrous counterpart, nickel fluoride [10028-18-9], NiF2 , are the only known stable binary compounds of nickel and fluorine. The former is a greenish light yellow crystal or powder prepared by the addition of nickel carbonate to 30-50% aqueous HF solution. The nickel fluoride formed first goes into solution and then precipitates out as the tetrahydrate as the concentration of Nickel fluoride increases and that of HF decreases. When the addition of nickel is complete, the solution and the precipitates are dried at 75-100°C until all the water is expelled. The tetrahydrate has high solubility in aqueous HF, eg, 13.3 wt % in 30% HF. It is slightly soluble in water and insoluble in alcohol and ether.
Anhydrous Nickel fluoride, a light yellow colored powder, is prepared by the action of anhydrous HF on anhydrous NiCl2 , or nickel fluoride tetrahydrate at 300°C. It is also prepared by heating a mixture of NH4.HF2 and NiF2.4H2O. The other methods include the fluorination of metal salts using excess SF4 or using ClF3 at elevated temperatures, or the reaction of NiCO3 and anhydrous HF at 250°C.
Flammability and Explosibility
Nonflammable
Safety Profile
NTP 10th Report on
Carcinogens. Reacts violently with
potassium. Chronic exposure may cause
mottling of teeth, changes in bones.
Mutation data reported. When heated to
decomposition it emits toxic fumes of F-.
See also FLUORIDES and NICKEL
COMPOUNDS.
Check Digit Verification of cas no
The CAS Registry Mumber 10028-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,0,2 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 10028-18:
(7*1)+(6*0)+(5*0)+(4*2)+(3*8)+(2*1)+(1*8)=49
49 % 10 = 9
So 10028-18-9 is a valid CAS Registry Number.
InChI:InChI=1/2FH.Ni/h2*1H;/q;;+2/p-2
10028-18-9Relevant articles and documents
Hydrogenation process
-
, (2008/06/13)
Process for the hydrogenation of functionally substituted acetylenic compounds employing catalyst comprising nickel boride on an inorganic oxide support is disclosed. Functionally-substituted acetylenic compounds are selectively reduced under mild reaction conditions to give functionally-substituted cis-olefinic compounds in high yield.
